add WorkspaceDuplicateCriteria decorator + update duplicate resolver logic (#10128)

## Context

All objects have '...duplicates' resolver but only companies and people
have duplicate criteria (hard coded constant).
Gql schema and resolver should be created only if duplicate criteria
exist.

## Solution

- Add a new @WorkspaceDuplicateCriteria decorator at object level,
defining duplicate criteria for given object.
- Add a new duplicate criteria field in ObjectMetadata table
- Update schema and resolver building logic
- Update front requests for duplicate check (only for object with
criteria defined)



closes https://github.com/twentyhq/twenty/issues/9828

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/comparators/workspace-object.comparator.ts

@@ -63,9 +63,18 @@ export class WorkspaceObjectComparator {
     for (const difference of objectMetadataDifference) {
       // We only handle CHANGE here as REMOVE and CREATE are handled earlier.
       if (difference.type === 'CHANGE') {
+        // If the old value and the new value are both null, skip
+        // Database is storing null, and we can get undefined here
+        if (
+          difference.oldValue === null &&
+          (difference.value === null || difference.value === undefined)
+        ) {
+          continue;
+        }
+
         const property = difference.path[0];
 
-        objectPropertiesToUpdate[property] = difference.value;
+        objectPropertiesToUpdate[property] = standardObjectMetadata[property];
       }
     }